JP4148757B2 - Switch device - Google Patents

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JP4148757B2
JP4148757B2 JP2002327224A JP2002327224A JP4148757B2 JP 4148757 B2 JP4148757 B2 JP 4148757B2 JP 2002327224 A JP2002327224 A JP 2002327224A JP 2002327224 A JP2002327224 A JP 2002327224A JP 4148757 B2 JP4148757 B2 JP 4148757B2
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front panel
key
switch device
holding
drive lever
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JP2004164929A (en
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敏明 天野
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、前面パネルから突出する操作キーを押圧操作することによって、前面パネルの裏面側に設置されているスイッチ素子を作動させるスイッチ装置に係り、特に、車載用として好適なスイッチ装置に関する。
【0002】
【従来の技術】
カーエアコンやカーオーディオ等の車載用電子機器の前面パネル(コントロールパネル)には、各種の操作キーや表示部が配設されている。これらの操作キーは、前面パネルの裏面側に配設されているプッシュスイッチ等のスイッチ素子を作動させるためのもので、従来は図7に示すように、上端側が軸支された操作キー1を前方から押し込むと、駆動棒2を介してスイッチ素子3が押圧駆動されるという構成のスイッチ装置が広く採用されている(例えば、特許文献1参照)。
【0003】
図7に示す従来のスイッチ装置において、操作キー1の上端部には軸部1aが設けられている。この軸部1aは、支持ケース4に設けられた保持板部4aに軸支されているので、操作キー1は、軸部1aを回転軸として所定の角度範囲内で回動可能な状態で、支持ケース4に支持されている。前面パネル5には、操作キー1を配置させるための開口部5aが設けられており、操作キー1に矢印Fで示す押圧操作力を加えると、この操作キー1は開口部5a内を奥側(図示右側)へと移動する。前面パネル4の裏面側のスペースには回路基板6が立設されており、この回路基板6にプッシュタイプのスイッチ素子3が実装されている。操作キー1の下端部とスイッチ素子3との間には駆動棒2が介設されており、操作キー1が押圧操作されると駆動棒2は回路基板6に向かって移動する。
【0004】
したがって、操作キー1を押圧操作して駆動棒2を所定ストローク移動させることにより、スイッチ素子3をオン動作させることができる。また、かかるオン状態で操作力を除去すれば、オフ位置へと戻るスイッチ素子3の自己復帰力により、駆動棒2を介して操作キー1が押し戻されるため、操作キー1は当初の非操作位置へと自動復帰する。
【0005】
【特許文献1】
特開2001−14978号公報(図2)
【0006】
【発明が解決しようとする課題】
上述した従来のスイッチ装置を組み込む際には、その操作キー1と同程度の大きさの開口部5aを前面パネル5に確保しなければならないが、近年、車載用電子機器の前面パネルにおいては多機能化に伴い表示部が大型化し操作キーの数も増える傾向にあるため、操作キー1用の開口部5aを前面パネル5に数多く設けることが次第に困難になってきている。また、前面パネル5の小型化が促進された場合にも、操作キー1用の開口部5aを必要数だけ確保することは次第に困難となる。もちろん、操作キー1を小さくすれば開口部5aも小さくて済むが、こうすると操作性が著しく悪化するので好ましくない。そこで最近、電子機器の多機能化や前面パネルの小型化に対応するために、前面パネルに設ける操作キー用の開口部が小さくて済む新たな構造のスイッチ装置が要望されている。
【0007】
こうした要望に応えうるスイッチ装置として、例えば、前面パネルの表面側に上向きの操作キーを配置させて、この操作キーを下向きに押圧操作するという鍵盤操作方式のスイッチ装置が考えられる。このものは、操作キーから前面パネルの裏面側へと延出する部分をレバーのように動作させることにより、押圧操作時に該延出部分を介してスイッチ素子を押圧駆動することが可能であり、かつ前面パネルに操作キー用の大きな開口部を設ける必要もなくなる。しかしながら、下向きの押圧操作力は時に過大な力となる場合が多く、上向きの操作キーが落下物等により衝撃を受けることもあるので、かかる鍵盤操作方式のスイッチ装置を実現しようとする場合には、操作キーの取付構造や支持構造に特別な配慮が必要で、大幅なコストアップを伴う可能性があった。
【0008】
本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、操作性が良好で、かつ前面パネルに操作キー用の大きな開口部を設ける必要がないスイッチ装置を安価に提供することにある。
【0009】
【課題を解決するための手段】
上述した目的を達成する解決手段として、本発明のスイッチ装置では、前面パネルの表面側に突出して下向きに押圧操作される操作キーを設けた操作部材と、板厚方向に可撓性を有し撓むことによって前記操作部材の取付部がスナップ嵌合され該取付部を回動可能に支持する保持板部が突設された保持部材と、前記操作部材を回転させる操作によって押圧駆動されるスイッチ素子とを備え、前記前面パネルの裏面の、前記保持板部の撓みを規制する位置に補強部を突設する構成とした。
【0010】
このように構成されるスイッチ装置は、前面パネルの表面側に突出させた操作キーを下向きに押圧操作して操作部材を回転させると、この押圧操作によってスイッチ素子を押圧駆動できるというものなので、鍵盤を操作するような容易さで上向きの操作キーを操作することができると共に、前面パネルに操作キー用の大きな開口部を設ける必要がなくなる。また、操作部材の取付部を回動可能に支持する保持部材が撓みすぎないように前面パネルの補強部にて補強しているので、過大な操作力や衝撃等が作用しても操作部材が保持部材から脱落しにくくなっており、それゆえスナップ嵌合という簡便な取付構造を採用しても十分な取付強度が得られることになって、組立性の向上や部品点数の削減が図りやすくなっている。ここで、保持部材が、略水平方向に可撓性を有する板状部材であれば、操作部材を介して保持部材に加わる過大な操作力等が該保持部材の板厚に直交する向きとなるため、保持部材の破損事故が回避しやすくなって好ましい。
【0011】
また、かかるスイッチ装置は、操作部材に係合して押圧操作時に該操作部材によって回転駆動される駆動レバーを備え、該駆動レバーを介してスイッチ素子が押圧駆動されるように構成しておくことにより、前面パネルの表面側の下端部に操作キーを配置させて、かつスイッチ素子を前面パネルの裏面側の任意の高さ位置に配置させることが可能となるため、操作キーが前面パネルの意匠性や操作性を損なう恐れがなくなると共に、スイッチ素子等を実装する回路基板を所望の位置に配置させやすくなる。例えば、スイッチ素子を、起立姿勢に保持された回路基板に実装しておけば、このスイッチ素子と同一面に実装される光源等の他の電子部品を前面パネルと対向させることができるため、好ましい。
【0012】
また、操作部材が、操作キーと、前記取付部を含むキー保持体とを連結して構成され、該キー保持体を駆動レバーに係合させるようにしたスイッチ装置においては、前面パネルの表裏両側から操作キーとキー保持体とを連結することができるため、操作部材用として前面パネルに必要な開口部が極めて小さくて済む。
【0013】
【発明の実施の形態】
発明の実施の形態を図面を参照して説明すると、図1は本実施形態例に係るスイッチ装置を組み込んだスイッチユニットの断面図、図2は該スイッチユニットの分解斜視図、図3は該スイッチ装置の動作説明図、図4は図1,2に示す支持部材の断面図、図5は図1,2に示す前面パネルの背面図、図6は該前面パネルの断面図である。
【0014】
図1,2に示すスイッチユニット10は、車載用電子機器の一部であって、前面パネル11と、支持ケース13を含む複数のスイッチ装置12と、ゴムシート22を載置した回路基板14と、コネクタ15およびカバー16とによって主に構成されている。ここで、各スイッチ装置12は、操作キー17およびキー保持レバー18を連結してなる操作部材19と、このキー保持レバー18に回転駆動される駆動レバー20と、この駆動レバー20に押圧駆動されるプッシュタイプの一対のスイッチ素子21と、キー保持レバー18および駆動レバー20を回転可能に支持する支持ケース13とによって構成され、支持ケース13は複数のスイッチ装置12で共有されている。なお、スイッチ素子21は、ゴムシート22に突設されたドーム形状のクリックゴム22aの内部に設けられている可動接点部22bと、回路基板14に設けられている固定接点部14aとを、接離可能に対向させてなる公知のもので、クリックゴム22aを所定ストローク押し込んで座屈させることにより可動接点部22bが固定接点部14aに当接するようになっている。
【0015】
前面パネル11には、各操作キー17の連結軸17aを配置させるための複数の開口部11aや、回路基板14に実装された発光ダイオード23の光によって照光する複数の表示部11bが設けられている。また、前面パネル11の裏面には、図5,6に示すように補強リブ11cが突設されている。この前面パネル11は、支持ケース13の前端部に取り付けられる。
【0016】
操作キー17は、その被押圧面17bを上に向けた姿勢で、前面パネル11の表面側に配置され、下向きに押圧操作される。操作キー17の連結軸17aは前面パネル11の開口部11aを貫通して、キー保持レバー18の嵌合穴18aに圧入されている。そして、嵌合穴18aに圧入した連結軸17aとキー保持レバー18とが固定ねじ24によって固定されている。それゆえ、操作部材19を構成する操作キー17とキー保持レバー18は強固に連結されている。キー保持レバー18の両側部には取付板18bが突設されており、各取付板18bには、支持ケース13の前部に突設されている保持板部13aのボス13bが挿入される軸孔18cが形成されている。保持板部13aは板厚方向に可撓性を有するため、組立時には、相対向する一対の保持板部13aの間にキー保持レバー18を押し込んでいくことにより、各軸孔18c内に回転軸となるボス13bをスナップインさせて、キー保持レバー18を支持ケース13に回動可能に支持された状態となすことができる。また、こうしてキー保持レバー18を支持ケース13の前部にスナップ嵌合させた後、前面パネル11を支持ケース13に取り付けると、保持板部13aの撓みを規制する位置に前記補強リブ11cが配置される。さらに、キー保持レバー18には嵌合穴18aを挟む両肩部分に、駆動レバー20の突出片20aが搭載される一対の係合面18dが設けられている。
【0017】
駆動レバー20の両側部には、支持ケース13の後部に突設されているボス13cが挿入される軸孔20bと、この軸孔20bに隣接してボス13cの約半周分と係合する軸受部20cとが形成されている。そして、各軸孔20bに支持ケース13のボス13cをスナップインさせて、各突出片20aをキー保持レバー18の係合面18d上に搭載することにより、駆動レバー20を、キー保持レバー18に係合しつつ支持ケース13に回動可能に支持された状態となすことができる。また、こうして駆動レバー20を支持ケース13の後部にスナップ嵌合させた後、駆動レバー20の背面と対向する位置に、ゴムシート22を載置した回路基板14を設置するが、このとき、図3に示すように駆動レバー20と回路基板14との間隔dが、駆動レバー20の回転軸となるボス13cの半径rよりも小さくなるように設定しておく。これにより、大きな外力が作用して駆動レバー20が位置ずれを起こしたとしても、回路基板14の規制を受けるため、軸受部20cからボス13cが外れるような位置ずれは回避できる。なお、駆動レバー20の上端部は、クリックゴム22aの頂部に常時当接する押圧部20dとなっている。
【0018】
回路基板14は背面側がカバー16によって支持され、このカバー16は裏蓋として支持ケース13に取り付けられる。また、回路基板14に載置されたゴムシート22のクリックゴム22aは、駆動レバー20の押圧部20dにプリテンションを加えた状態で組み込まれる。この回路基板14にはコネクタ15が接続され、このコネクタ15から導出されるケ−ブル25がカバー16の背面から外方へ引き出される。
【0019】
このように構成されるスイッチユニット10を組み立てる際には、まず、前面パネル11の開口部11aに挿通した操作キー17の連結軸17aをキー保持レバー18の嵌合穴18aに圧入した後、固定ねじ24を締結して一体品の操作部材19となす。次に、回転軸となるボス13bを軸孔18c内にスナップインさせることにより、操作部材19を支持ケース13の前部に回動可能に取り付ける。続いて、前面パネル11を支持ケース13の前端部に取り付ける。しかる後、回転軸となるボス13cを軸孔20b内にスナップインさせることにより、駆動レバー20を支持ケース13の後部に回動可能に取り付けると共に、この駆動レバー20の突出片20aをキー保持レバー18の係合面18d上に搭載する。そして、ゴムシート22を載置した回路基板14にコネクタ15を接続して、駆動レバー20の背面側に立設した後、これら回路基板14およびコネクタ15を背面側から支持するカバー16を、裏蓋として支持ケース13に取り付けて、組立を完了する。
【0020】
次に、上述したスイッチユニット10の動作について説明する。非操作時にはクリックゴム22aからのプリテンションによって、駆動レバー20の突出片20aがキー保持レバー18の係合面18dを下向きに付勢しているため、操作部材19は図1に実線で示す姿勢に保持されており、操作キー17は回動範囲内の最上点に位置している。
【0021】
この状態で、操作者が操作キー17の被押圧面17bを下向きに押し込むと、連結軸17aを介してキー保持レバー18が回転駆動されるため、ボス13bを回転軸として操作部材19は図1の反時計回り(図3の矢印A方向)に回転し、それに伴い係合面18dが突出片20aを押し上げて、駆動レバー20が図3の矢印B方向に回転し、押圧部20dがクリックゴム22aを押し込んでいく。そして、操作キー17が図1に鎖線で示す位置まで押し下げられると、押圧部20dに所定ストローク押し込まれたクリックゴム22aが座屈して、可動接点部22bが固定接点部14aに当接し、スイッチ素子21がオフからオン状態へと切り替わる。
【0022】
つまり、本実施形態例に係るスイッチ装置12は図3に示すように、操作部材19に対する操作力の作用点と該操作部材19の回転中心Pとを結ぶ第1の直線L1と、スイッチ素子21に対する操作力の作用点と該回転中心Pとを結ぶ第2の直線L2とのなす角度αが、操作時に増大するようになっている。これに対して図7に示す従来のスイッチ装置では、この角度αが操作時に減少するようになっている。換言するなら、本実施形態例に係るスイッチ装置12の場合、操作キー17の被押圧面17bが操作時にスイッチ素子21から遠ざかるように構成されている。
【0023】
また、かかるオン状態で操作キー17に対する操作力を除去すれば、座屈していたクリックゴム22aが自身の弾性で元のドーム形状に戻るため、可動接点部22bが固定接点部14aから離れてスイッチ素子21はオフ状態へと戻り、かつ、クリックゴム22aに押し戻された駆動レバー20の突出片20aがキー保持レバー18の係合面18dを押し下げるため、操作部材19は逆向きに回転して当初の非操作位置まで自動復帰する。
【0024】
このように本実施形態例に係るスイッチ装置12は、前面パネル11の表面側に突出させた操作キー17を下向きに押圧操作することにより、駆動レバー20を介してスイッチ素子21が押圧駆動できるというものなので、鍵盤を操作するような容易さで上向きの操作キー17を操作することができる。また、前面パネル11に必要な操作部材19用の開口部11aを、連結軸17aの昇降を許容する程度の小さな開口となすことができるため、前面パネル11にスペースの余裕が生まれて電子機器の多機能化に対応させやすく、前面パネル11自体の小型化も図りやすくなっている。なお、こうして操作キー17を前面パネル11の表面側の下端部に配置しておけば、前面パネル11の意匠性が損なわれる心配はない。また、スイッチ装置12の形状を適宜変更することによって、回路基板14の立設位置やスイッチ素子21の実装位置は任意に選択できるので、前面パネル11に対向させることが好ましい発光ダイオード23等の他の電子部品を所望の位置に配設することができる。
【0025】
さらに、本実施形態例においては、キー保持レバー18の取付板18bを回動可能に支持している支持ケース13の保持板部13aが撓みすぎないように、前面パネル11の裏側に突設した補強リブ11cによって該保持板部13aの撓みを規制しているので、過大な操作力や衝撃等が作用してもキー保持レバー18が支持ケース13から脱落する心配はない。そのため、キー保持レバー18を前面パネル11の前部にスナップ嵌合させるという簡便な取付構造を採用しつつ、十分な取付強度が得られることになって、組立性の向上や部品点数の削減によりコストダウンが図れる。なお、操作部材19を介して保持板部13aに加わる過大な操作力等は、保持板部13aの板厚に直交する向きとなるため、こうした大きな力で保持板部13aが破損する危険性も少ない。
【0026】
なお、本実施形態例では、操作部材19側の軸孔18cと駆動レバー20側の軸孔20bにそれぞれ、支持ケース13側のボス13bとボス13cを挿入して回転軸となしているが、操作部材19側や駆動レバー20側に回転軸を設けて、支持ケース13側に軸受部を設ける構成にしてもよい。また、本実施形態例では1個の操作キー17によって2個のスイッチ素子21が同時にオン動作するスイッチ装置12について例示しているが、1個の操作キー17に1個または3個以上のスイッチ素子21を対応させる構成であってもよく、スイッチ素子自体の構成も適宜選択可能である。さらにまた、前面パネル11と対向する位置ではなく、もっと下方にスイッチ装置が実装できる場合には、操作キー17と一体のキー保持体に該スイッチ素子を押圧駆動する押圧部を直接設けて、駆動レバー20を省略した構成とすることも可能である。
【0027】
【発明の効果】
本発明は、以上説明したような形態で実施され、以下に記載されるような効果を奏する。
【0028】
前面パネルの表面側に突出させた操作キーを下向きに押圧操作して操作部材を回転させると、この押圧操作によってスイッチ素子を押圧駆動できるというスイッチ装置なので、鍵盤を操作するような容易さで上向きの操作キーを操作することができる。また、前面パネルに操作キー用の大きな開口部を設ける必要がなくなるため、前面パネルにスペースの余裕が生まれて電子機器の多機能化に対応させやすく、前面パネルの小型化も図りやすくなる。また、操作部材の取付部を回動可能に支持する保持部材が撓みすぎないように前面パネルの補強部にて補強しているので、過大な操作力や衝撃等が作用しても操作部材が保持部材から脱落しにくくなっており、それゆえスナップ嵌合という簡便な取付構造を採用しても十分な取付強度が得られることになって、組立性の向上や部品点数の削減によりコストダウンが図りやすくなる。ここで、保持部材が、略水平方向に可撓性を有する板状部材であれば、操作部材を介して保持部材に加わる過大な操作力等が該保持部材の板厚に直交する向きとなるため、保持部材の破損事故が回避しやすくなる。
【0029】
また、操作部材に係合して押圧操作時に該操作部材によって回転駆動される駆動レバーを備え、この駆動レバーを介してスイッチ素子が押圧駆動されるようにしておけば、前面パネルの表面側の下端部に操作キーを配置させて、かつスイッチ素子を前面パネルの裏面側の任意の高さ位置に配置させることが可能となるため、操作キーが前面パネルの意匠性や操作性を損なう恐れがなくなると共に、スイッチ素子等を実装する回路基板を所望の位置に配置させやすくなる。
【図面の簡単な説明】
【図1】本実施形態例に係るスイッチ装置を組み込んだスイッチユニットの断面図である。
【図2】該スイッチユニットの分解斜視図である。
【図3】該スイッチ装置の動作説明図である。
【図4】図1,2に示す支持部材の断面図である。
【図5】図1,2に示す前面パネルの背面図である。
【図6】該前面パネルの断面図である。
【図7】従来技術を示す説明図である。
【符号の説明】
10 スイッチユニット
11 前面パネル
11a 開口部
11c 補強リブ
12 スイッチ装置
13 支持ケース
13a 保持板部(保持部材)
13b,13c ボス
14 回路基板
17 操作キー
17a 連結軸
18 キー保持レバー(キー保持体)
18b 取付板(取付部)
18c 軸孔
18d 係合面
19 操作部材
20 駆動レバー
20a 突出片
20b 軸孔
20c 軸受部
21 スイッチ素子
22a クリックゴム
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch device that operates a switch element installed on the back side of a front panel by pressing an operation key protruding from the front panel, and more particularly to a switch device suitable for in-vehicle use.
[0002]
[Prior art]
Various operation keys and a display unit are disposed on a front panel (control panel) of an in-vehicle electronic device such as a car air conditioner or a car audio. These operation keys are for operating a switch element such as a push switch disposed on the back side of the front panel. Conventionally, as shown in FIG. 7, an operation key 1 whose upper end is pivotally supported is provided. A switch device having a configuration in which the switch element 3 is pressed and driven through the drive rod 2 when pushed in from the front is widely used (see, for example, Patent Document 1).
[0003]
In the conventional switch device shown in FIG. 7, a shaft portion 1 a is provided at the upper end portion of the operation key 1. Since this shaft portion 1a is pivotally supported by a holding plate portion 4a provided in the support case 4, the operation key 1 can be rotated within a predetermined angle range with the shaft portion 1a as a rotation axis. It is supported by the support case 4. The front panel 5 is provided with an opening 5a for placing the operation key 1, and when a pressing operation force indicated by an arrow F is applied to the operation key 1, the operation key 1 moves to the back side in the opening 5a. Move to the right side of the figure. A circuit board 6 is erected in a space on the back surface side of the front panel 4, and a push type switch element 3 is mounted on the circuit board 6. A drive rod 2 is interposed between the lower end portion of the operation key 1 and the switch element 3, and the drive rod 2 moves toward the circuit board 6 when the operation key 1 is pressed.
[0004]
Therefore, the switch element 3 can be turned on by pressing the operation key 1 and moving the drive rod 2 by a predetermined stroke. Further, if the operation force is removed in such an on state, the operation key 1 is pushed back through the drive rod 2 by the self-returning force of the switch element 3 that returns to the off position. Automatically return to
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-14978 (FIG. 2)
[0006]
[Problems to be solved by the invention]
When incorporating the above-described conventional switch device, it is necessary to secure an opening 5a having the same size as that of the operation key 1 in the front panel 5, but in recent years, the front panel of an in-vehicle electronic device is often used. With the trend toward functionalization, the size of the display section tends to increase and the number of operation keys tends to increase, so it is becoming increasingly difficult to provide a large number of openings 5 a for the operation keys 1 in the front panel 5. In addition, even when downsizing of the front panel 5 is promoted, it is gradually difficult to secure the necessary number of openings 5a for the operation keys 1. Of course, if the operation key 1 is made smaller, the opening 5a can be made smaller, but this is not preferable because the operability is significantly deteriorated. Therefore, recently, there is a demand for a switch device having a new structure that requires only a small opening for an operation key provided on the front panel in order to cope with the multi-function of electronic devices and the miniaturization of the front panel.
[0007]
As a switch device that can meet such demands, for example, a keyboard operation type switch device in which an upward operation key is arranged on the front surface side of the front panel and the operation key is pressed downward can be considered. This can operate the part that extends from the operation key to the back side of the front panel like a lever, so that the switch element can be pressed and driven through the extended part during the pressing operation. In addition, it is not necessary to provide a large opening for the operation key on the front panel. However, the downward pressing operation force is often excessive, and the upward operation key may be impacted by a fallen object or the like, so when trying to realize such a keyboard operation type switch device. , Special considerations were required for the operation key mounting structure and support structure, which could result in significant cost increases.
[0008]
The present invention has been made in view of such a state of the art, and an object of the present invention is to inexpensively provide a switch device that has good operability and does not require a large opening for an operation key on the front panel. It is to provide.
[0009]
[Means for Solving the Problems]
As a means for achieving the above-described object, the switch device of the present invention has an operation member provided with an operation key that protrudes from the front side of the front panel and is pressed downward, and has flexibility in the thickness direction. a holding member holding plate portion rotatably supporting the mounting portion of the part with snap-fitted said mounting of the operating member is projected by the flex, driven pressed by the operation of rotating the operation member The switch element is provided, and the reinforcing part protrudes at a position on the back surface of the front panel that restricts the bending of the holding plate part .
[0010]
The switch device configured in this manner is such that when the operation key that is protruded toward the front side of the front panel is pressed downward to rotate the operation member, the switch element can be pressed and driven by this pressing operation. Thus, it is possible to operate the upward operation key with such an ease of operation, and it is not necessary to provide a large opening for the operation key on the front panel. In addition, since the holding member that rotatably supports the mounting portion of the operation member is reinforced by the reinforcing portion of the front panel so that the operation member does not bend excessively, the operation member is not affected even if an excessive operation force or impact is applied. It is difficult to drop off from the holding member, so that sufficient mounting strength can be obtained even if a simple mounting structure called snap fitting is adopted, making it easier to improve assembly and reduce the number of parts. ing. Here, if the holding member is a plate-like member having flexibility in a substantially horizontal direction, an excessive operating force applied to the holding member via the operation member is in a direction orthogonal to the plate thickness of the holding member. For this reason, it is preferable because an accident of damage to the holding member can be easily avoided.
[0011]
Further, the switch device includes a drive lever that is engaged with the operation member and is rotationally driven by the operation member at the time of a pressing operation, and the switch element is configured to be pressed and driven through the drive lever. Therefore, the operation key can be arranged at the lower end portion on the front side of the front panel and the switch element can be arranged at an arbitrary height position on the back side of the front panel. The circuit board on which the switch element or the like is mounted can be easily placed at a desired position. For example, if the switch element is mounted on a circuit board held in an upright position, other electronic components such as a light source mounted on the same surface as the switch element can be opposed to the front panel, which is preferable. .
[0012]
In the switch device in which the operation member is configured by connecting the operation key and the key holding body including the mounting portion, and the key holding body is engaged with the drive lever, both the front and back sides of the front panel are provided. Since the operation key and the key holder can be connected to each other, the opening required for the front panel for the operation member can be extremely small.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the invention will be described with reference to the drawings. FIG. 1 is a sectional view of a switch unit incorporating a switch device according to this embodiment, FIG. 2 is an exploded perspective view of the switch unit, and FIG. 4 is a sectional view of the support member shown in FIGS. 1 and 2, FIG. 5 is a rear view of the front panel shown in FIGS. 1 and 2, and FIG. 6 is a sectional view of the front panel.
[0014]
The switch unit 10 shown in FIGS. 1 and 2 is a part of an in-vehicle electronic device, and includes a front panel 11, a plurality of switch devices 12 including a support case 13, and a circuit board 14 on which a rubber sheet 22 is placed. The connector 15 and the cover 16 are mainly configured. Here, each switch device 12 is driven by an operation member 19 formed by connecting an operation key 17 and a key holding lever 18, a drive lever 20 that is rotationally driven by the key holding lever 18, and the drive lever 20. And a support case 13 that rotatably supports the key holding lever 18 and the drive lever 20, and the support case 13 is shared by a plurality of switch devices 12. The switch element 21 connects the movable contact portion 22b provided inside the dome-shaped click rubber 22a protruding from the rubber sheet 22 and the fixed contact portion 14a provided on the circuit board 14. The movable contact portion 22b comes into contact with the fixed contact portion 14a by pressing the click rubber 22a for a predetermined stroke to be buckled.
[0015]
The front panel 11 is provided with a plurality of openings 11a for arranging the connecting shafts 17a of the operation keys 17 and a plurality of display portions 11b that are illuminated by light of the light emitting diodes 23 mounted on the circuit board 14. Yes. Further, as shown in FIGS. 5 and 6, reinforcing ribs 11 c are projected on the back surface of the front panel 11. The front panel 11 is attached to the front end portion of the support case 13.
[0016]
The operation key 17 is disposed on the front surface side of the front panel 11 with the pressed surface 17b facing upward, and is pressed downward. The connecting shaft 17 a of the operation key 17 passes through the opening 11 a of the front panel 11 and is press-fitted into the fitting hole 18 a of the key holding lever 18. The connecting shaft 17a press-fitted into the fitting hole 18a and the key holding lever 18 are fixed by a fixing screw 24. Therefore, the operation key 17 and the key holding lever 18 constituting the operation member 19 are firmly connected. Mounting plates 18b protrude from both side portions of the key holding lever 18, and shafts into which the bosses 13b of the holding plate portion 13a protruding from the front portion of the support case 13 are inserted into each mounting plate 18b. A hole 18c is formed. Since the holding plate portion 13a has flexibility in the plate thickness direction, when assembling, the key holding lever 18 is pushed between the pair of holding plate portions 13a facing each other, thereby rotating the rotation shaft into each shaft hole 18c. The key holding lever 18 can be pivotally supported by the support case 13 by snapping in the boss 13b. When the front panel 11 is attached to the support case 13 after the key holding lever 18 is snap-fitted to the front portion of the support case 13 in this way, the reinforcing rib 11c is disposed at a position that restricts the bending of the holding plate portion 13a. Is done. Further, the key holding lever 18 is provided with a pair of engagement surfaces 18d on which the protruding pieces 20a of the drive lever 20 are mounted on both shoulder portions sandwiching the fitting hole 18a.
[0017]
On both sides of the drive lever 20, a shaft hole 20b into which a boss 13c projecting from the rear portion of the support case 13 is inserted, and a bearing that engages with about a half circumference of the boss 13c adjacent to the shaft hole 20b. A portion 20c is formed. Then, the bosses 13c of the support case 13 are snapped into the shaft holes 20b, and the projecting pieces 20a are mounted on the engaging surfaces 18d of the key holding lever 18 so that the drive lever 20 is attached to the key holding lever 18. It can be set as the state supported by the support case 13 so that rotation was possible, engaging. Further, after the drive lever 20 is snap-fitted to the rear portion of the support case 13 in this way, the circuit board 14 on which the rubber sheet 22 is placed is installed at a position facing the back surface of the drive lever 20. As shown in FIG. 3, the distance d between the drive lever 20 and the circuit board 14 is set to be smaller than the radius r of the boss 13 c serving as the rotation axis of the drive lever 20. Thereby, even if the drive lever 20 is displaced due to a large external force, the displacement of the boss 13c from the bearing portion 20c can be avoided because the circuit board 14 is restricted. The upper end portion of the drive lever 20 is a pressing portion 20d that is always in contact with the top portion of the click rubber 22a.
[0018]
The back side of the circuit board 14 is supported by a cover 16, and the cover 16 is attached to the support case 13 as a back cover. Further, the click rubber 22 a of the rubber sheet 22 placed on the circuit board 14 is incorporated in a state where a pretension is applied to the pressing portion 20 d of the drive lever 20. A connector 15 is connected to the circuit board 14, and a cable 25 led out from the connector 15 is pulled out from the back surface of the cover 16.
[0019]
When assembling the switch unit 10 configured as described above, first, the connecting shaft 17a of the operation key 17 inserted through the opening 11a of the front panel 11 is press-fitted into the fitting hole 18a of the key holding lever 18 and then fixed. The screw 24 is fastened to form the integrated operation member 19. Next, the operating member 19 is pivotally attached to the front portion of the support case 13 by snapping the boss 13b serving as the rotation shaft into the shaft hole 18c. Subsequently, the front panel 11 is attached to the front end portion of the support case 13. Thereafter, the drive lever 20 is pivotally attached to the rear portion of the support case 13 by snapping the boss 13c serving as the rotation shaft into the shaft hole 20b, and the protruding piece 20a of the drive lever 20 is attached to the key holding lever. It is mounted on 18 engagement surfaces 18d. Then, after connecting the connector 15 to the circuit board 14 on which the rubber sheet 22 is placed and standing on the back side of the drive lever 20, the cover 16 that supports the circuit board 14 and the connector 15 from the back side is attached to the back side. Attach to the support case 13 as a lid to complete the assembly.
[0020]
Next, the operation of the switch unit 10 described above will be described. When not operated, the projecting piece 20a of the drive lever 20 urges the engaging surface 18d of the key holding lever 18 downward by the pretension from the click rubber 22a, so that the operating member 19 is in the posture shown by the solid line in FIG. The operation key 17 is located at the highest point in the rotation range.
[0021]
In this state, when the operator pushes the pressed surface 17b of the operation key 17 downward, the key holding lever 18 is rotationally driven through the connecting shaft 17a, so that the operation member 19 is shown in FIG. Is rotated counterclockwise (in the direction of arrow A in FIG. 3), and the engagement surface 18d pushes up the protruding piece 20a, and the drive lever 20 is rotated in the direction of arrow B in FIG. 22a is pushed in. When the operation key 17 is pushed down to the position indicated by the chain line in FIG. 1, the click rubber 22a pushed into the pressing portion 20d for a predetermined stroke buckles, and the movable contact portion 22b comes into contact with the fixed contact portion 14a, and the switch element 21 switches from off to on.
[0022]
That is, as shown in FIG. 3, the switch device 12 according to the present embodiment includes a first straight line L <b> 1 that connects the point of operation force applied to the operation member 19 and the rotation center P of the operation member 19, and the switch element 21. The angle α formed by the second straight line L2 connecting the operating point of the operating force and the rotation center P is increased during the operation. On the other hand, in the conventional switch device shown in FIG. 7, the angle α decreases during operation. In other words, in the case of the switch device 12 according to this embodiment, the pressed surface 17b of the operation key 17 is configured to move away from the switch element 21 during operation.
[0023]
Also, if the operating force on the operation key 17 is removed in such an on state, the buckled click rubber 22a returns to its original dome shape by its own elasticity, so that the movable contact portion 22b moves away from the fixed contact portion 14a and is switched The element 21 returns to the off state, and the projecting piece 20a of the drive lever 20 pushed back by the click rubber 22a pushes down the engagement surface 18d of the key holding lever 18, so that the operation member 19 rotates in the opposite direction and is initially It automatically returns to the non-operation position.
[0024]
As described above, the switch device 12 according to the present embodiment can press the switch element 21 via the drive lever 20 by pressing the operation key 17 projected to the front side of the front panel 11 downward. Therefore, the upward operation key 17 can be operated as easily as operating the keyboard. In addition, since the opening 11a for the operation member 19 necessary for the front panel 11 can be formed as a small opening that allows the connecting shaft 17a to move up and down, there is room for space in the front panel 11 and the electronic device. It is easy to cope with multi-functionality, and the front panel 11 itself can be easily downsized. If the operation key 17 is arranged at the lower end portion on the front surface side of the front panel 11 in this way, there is no concern that the design of the front panel 11 is impaired. Further, by appropriately changing the shape of the switch device 12, the standing position of the circuit board 14 and the mounting position of the switch element 21 can be arbitrarily selected. The electronic parts can be arranged at desired positions.
[0025]
Further, in the present embodiment, the holding plate portion 13a of the support case 13 that rotatably supports the mounting plate 18b of the key holding lever 18 is provided on the back side of the front panel 11 so as not to bend too much. Since the bending of the holding plate portion 13a is restricted by the reinforcing rib 11c, there is no fear that the key holding lever 18 will fall off the support case 13 even if an excessive operating force or impact is applied. Therefore, it is possible to obtain sufficient mounting strength while adopting a simple mounting structure in which the key holding lever 18 is snap-fitted to the front portion of the front panel 11, thereby improving assembling performance and reducing the number of parts. Cost can be reduced. The excessive operating force applied to the holding plate portion 13a via the operation member 19 is in a direction perpendicular to the plate thickness of the holding plate portion 13a, and therefore there is a risk that the holding plate portion 13a is damaged by such a large force. Few.
[0026]
In this embodiment, the boss 13b and the boss 13c on the support case 13 side are inserted into the shaft hole 18c on the operation member 19 side and the shaft hole 20b on the drive lever 20 side, respectively, to form the rotation shaft. A rotation shaft may be provided on the operation member 19 side or the drive lever 20 side, and a bearing portion may be provided on the support case 13 side. In the present embodiment, the switch device 12 in which two switch elements 21 are simultaneously turned on by one operation key 17 is illustrated. However, one or three or more switches are provided for one operation key 17. The structure corresponding to the element 21 may be used, and the structure of the switch element itself can be appropriately selected. Furthermore, when the switch device can be mounted at a position lower than the position opposed to the front panel 11, a pressing unit for pressing and driving the switch element is directly provided on the key holding body integrated with the operation key 17 to drive the switch device. A configuration in which the lever 20 is omitted is also possible.
[0027]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0028]
Since the switch device can press and drive the switch element by pressing the operation key protruding to the front side of the front panel downward and rotating the operation member, the switch element can be moved upward with the ease of operating the keyboard. The operation keys can be operated. In addition, since it is not necessary to provide a large opening for the operation key on the front panel, a space is created in the front panel, and it is easy to deal with the multi-functionalization of electronic devices, and it is easy to reduce the size of the front panel. In addition, since the holding member that rotatably supports the mounting portion of the operation member is reinforced by the reinforcing portion of the front panel so that the operation member does not bend excessively, the operation member is not affected even if an excessive operation force or impact is applied. It is difficult to drop off from the holding member, so even if a simple mounting structure called snap fitting is adopted, sufficient mounting strength can be obtained, reducing costs by improving assembly and reducing the number of parts. It becomes easy to plan. Here, if the holding member is a plate-like member having flexibility in a substantially horizontal direction, an excessive operating force applied to the holding member via the operation member is in a direction orthogonal to the plate thickness of the holding member. Therefore, it becomes easy to avoid the accident of breakage of the holding member.
[0029]
In addition, a drive lever that is engaged with the operation member and is rotationally driven by the operation member at the time of a pressing operation is provided, and if the switch element is pressed and driven through the drive lever, the surface side of the front panel is provided. Since the operation key can be arranged at the lower end and the switch element can be arranged at any height on the back side of the front panel, the operation key may impair the design and operability of the front panel. In addition, the circuit board on which the switch element or the like is mounted can be easily placed at a desired position.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a switch unit incorporating a switch device according to an embodiment.
FIG. 2 is an exploded perspective view of the switch unit.
FIG. 3 is an operation explanatory diagram of the switch device.
4 is a cross-sectional view of the support member shown in FIGS.
FIG. 5 is a rear view of the front panel shown in FIGS.
FIG. 6 is a cross-sectional view of the front panel.
FIG. 7 is an explanatory diagram showing a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Switch unit 11 Front panel 11a Opening part 11c Reinforcement rib 12 Switch apparatus 13 Support case 13a Holding plate part (holding member)
13b, 13c Boss 14 Circuit board 17 Operation key 17a Connection shaft 18 Key holding lever (key holding body)
18b Mounting plate (mounting part)
18c Shaft hole 18d Engagement surface 19 Operation member 20 Drive lever 20a Projection piece 20b Shaft hole 20c Bearing portion 21 Switch element 22a Click rubber

Claims (5)

前面パネルの表面側に突出して下向きに押圧操作される操作キーを設けた操作部材と、板厚方向に可撓性を有し撓むことによって前記操作部材の取付部がスナップ嵌合され該取付部を回動可能に支持する保持板部が突設された保持部材と、前記操作部材を回転させる操作によって押圧駆動されるスイッチ素子とを備え、
前記前面パネルの裏面の、前記保持板部の撓みを規制する位置に補強部を突設したことを特徴とするスイッチ装置。
An operating member provided with operation keys is pressed downwardly projecting surface side of the front panel, the attachment portion of the operating member is snapped by the flex flexible in the thickness direction A holding member provided with a holding plate portion that rotatably supports the attachment portion, and a switch element that is pressed and driven by an operation of rotating the operation member;
A switch device, characterized in that a reinforcing portion protrudes from the back surface of the front panel at a position that restricts the bending of the holding plate portion .
請求項1の記載において、前記保持部材が、略水平方向に可撓性を有する板状部材であることを特徴とするスイッチ装置。  2. The switch device according to claim 1, wherein the holding member is a plate-like member having flexibility in a substantially horizontal direction. 請求項1または2の記載において、前記操作部材に係合して前記押圧操作時に該操作部材によって回転駆動される駆動レバーを備え、該駆動レバーを介して前記スイッチ素子が押圧駆動されるように構成したことを特徴とするスイッチ装置。  3. The drive lever according to claim 1, further comprising a drive lever that engages with the operation member and is rotationally driven by the operation member during the pressing operation, and the switch element is pressed and driven through the drive lever. A switch device characterized by comprising. 請求項3の記載において、前記スイッチ素子が、起立姿勢に保持された回路基板に実装されていることを特徴とするスイッチ装置。  4. The switch device according to claim 3, wherein the switch element is mounted on a circuit board held in a standing posture. 請求項1〜4のいずれかの記載において、前記操作部材が、前記操作キーと、前記取付部を含むキー保持体とを連結して構成され、該キー保持体を前記駆動レバーに係合させたことを特徴とするスイッチ装置。  5. The operation member according to claim 1, wherein the operation member is configured by connecting the operation key and a key holding body including the attachment portion, and the key holding body is engaged with the drive lever. A switch device characterized by that.
JP2002327224A 2002-11-11 2002-11-11 Switch device Expired - Fee Related JP4148757B2 (en)

Priority Applications (1)

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